“Cryptic strokes” in the past are now sine qua non of atrial fibrillation.This observational clinical study conducted on 200 stroke patients based on exclusion and inclusion criteria studies interplay of stroke and atrial fibrillation with respect to aetiology,types,clinico–radiological correlation and prognosis.Out of 200 patients studied, permanent type of AF and hypertrensive heart disease were most conmmon type of atrial fibrillation and it’s cause respectively.Of types of stroke in patients with AF,63.5% were thrombotic,35% were haemorrhagic including 1.5% of subarachnoid bleed. Morbidity scores, early recurrent strokes and case fatality were higher in patients with AF.Patients of atrial fibrillation have all varieties of stroke including thrombotic,haemorrhagic and subarachnoid bleed.They are likely to have compromised quality of life, morbidity–mortality aspects and higher early recurrence of stroke.It’s imperative not to miss treatable arrhythmia to bring down morbidity and mortality in stroke patients.